package com.mercury.pattern._09_facade;

/**
 *
 */
public class Projector {

    private static Projector dvdPlayer = new Projector();

    public static Projector getInstance() {
        return dvdPlayer;
    }


    public void on(){
        System.out.println(" 投影仪 开启 ");
    }

    public void off(){
        System.out.println(" 投影仪 关闭 ");
    }

}